According to David Palmer's 2006 book, Parent's Guide to IQ Testing and Gifted Education, the average score for customary intelligence tests is 100 with a standard deviation of 15; approximately 50% of the population will score between 90 and 109 on a modern IQ test.
How long the decomposition of compostable plates takes is a question that many people might ask, and several factors influence what the answer is. Generally, if a compostable plate is placed in a commercial compost facility, it will take less than 180 days to completely decompose.
Making the world better, one answer at a time. A very long time. Exactly how long depends a lot on the specific type of plastic as well as the environment that it is in. Exposure to direct sunlight helps speed up the process.Plastics never actually 'decompose', they merely break down into smaller and smaller pieces.Being an inorganic material, in never will compost.ow many years do plastic bags take to break down?     If you leave a plastic shopping bag in the garage in relatively dry conditions it will not last more than 3-4 years.